ECO mode does indeed get amazing MPG. My suburban commute the other day I got 32 MPG in ECO mode. I got around 22 with it off. So I sure would like to leave it on. But perhaps you just can't have it both ways. It sure feels like it could. Like if you quickly stomp on it, automatically switch to non ECO mode, then after cruising switch back to ECO mode.

This is what the "computer numbers" are showing you in EVIC? or did you actually do you MPG math by the old method?

EVIC numbers in my opinion are all useless, PSI on your tires, MPG, Temp. I no longer trust the info.

With the EVIC going black here and there, Radio issues, random warning lights, transmission problems, misaligned tail door, scratches on the paint and wheels,incorrect outside temp reading, buying the 2014 GC was a big mistake on my part, but i have to live with it. Cant sell it for i would lose money or else I would and go Japanese.

All issues could be what the adaptive system has learned by individual drivers. Not that it's right. But could explain a lot of variability in opinions.

I'm wondering that, too. It's not clear to me why an automatic transmission has to "adapt."

For what it's worth, we've only had ours--a September 9-10 build--for five days and never taken it out of Eco mode, and it shifts smoothly with no clunks or hesitations or seeking. I'm hoping it doesn't bother to "adapt."

I'm wondering that, too. It's not clear to me why an automatic transmission has to "adapt."

For what it's worth, we've only had ours--a September 9-10 build--for five days and never taken it out of Eco mode, and it shifts smoothly with no clunks or hesitations or seeking. I'm hoping it doesn't bother to "adapt."

This is what the "computer numbers" are showing you in EVIC? or did you actually do you MPG math by the old method?

EVIC numbers in my opinion are all useless, PSI on your tires, MPG, Temp. I no longer trust the info.

With the EVIC going black here and there, Radio issues, random warning lights, transmission problems, misaligned tail door, scratches on the paint and wheels,incorrect outside temp reading, buying the 2014 GC was a big mistake on my part, but i have to live with it. Cant sell it for i would lose money or else I would and go Japanese.

I don't have much issue with EVIC numbers. It's never gone blank.

Tire pressure is close. But you have to be aware how TPMS works.

EVIC MPG might not be perfect but comparing one mode to another it's pretty close.

I don't trust the "Old Fashion way" either because pumps vary a lot when they go off. Temperature can effect how much gas goes in etc. You'd have to do several tanks and get an average. I tend to trust the computer numbers more. But more data is always more accurate. There are lots of variables that effect MPG. Tons.

Only issue I have is too much lag in ECO mode. Which causes you to, to stomp on gas pedal. And then things go bad.

I think it helped a tremendous amount getting one built past the Mid Model Year.

I had the last two transmission updates done, and can confirm that while the last update fixed my eco-mode issues for a while, the car is almost back to the way it was prior to the flashes. Upshifting too many gears too soon, not downshifting fast enough causing lag, and downshifting way too low when pressing slightly harder which causes the car to WOOOOSHHH. WTF Jeep.